Prevention of seizure in extrusion of aluminium alloy billet by dies having textured surface

被引：0

作者：

Mori K.-I. ^{[1
]}

Abe Y. ^{[1
]}

Kato S. ^{[1
]}

Osakada K. ^{[2
]}

机构：

[1] Department of Mechanical Engineering, Toyohashi University of Technology, Toyohashi, 441-8580, Aichi

[2] School of Engineering Science, Osaka University, Toyonaka, 560-8531, Osaka

来源：

Int. J. Lightweight Mater. Manuf. | / 3卷 / 206-211期

基金：

日本学术振兴会;

关键词：

Aluminium; Extrusion; Lubrication; Micro pocket; Seizure; Textured surface;

D O I：

10.1016/j.ijlmm.2019.05.003

中图分类号：

学科分类号：

摘要：

Seizure occurring in extrusion of an aluminium alloy billet was prevented by texturing the die surface. A liquid lubricant is entrapped in micro pockets produced on the textured surface, and is flowed out during extrusion to prevent the lubricant film breakdown. TiCN-based cermet and WC-Co dies having high anti-seizure property were employed, and the dull micro pockets were formed on the die surface by shot peening and polishing processes. The anti-seizure property was evaluated from single extrusion and repeated extrusion of an A5056 aluminium alloy billet using a liquid lubricant containing a sulphur additive. Although the roughness of the textured surface was about one order of magnitude larger than that of the polished surface, the anti-seizure property is considerably higher, whereas the difference in extrusion load between both surfaces was comparatively small. It was found that the TiCN-based cermet die having the textured surface has a high anti-seizure property. © 2019 The Authors

引用

页码：206 / 211

页数：5

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